code: def test_sep(self):
      normsep = os.path.normcase("\\") == os.path.normcase("/")
      self.assertEqual(
          filter(["usr/bin", "usr", "usr\\lib"], "usr/*"),
          ["usr/bin", "usr\\lib"] if normsep else ["usr/bin"],
      )
      self.assertEqual(
          filter(["usr/bin", "usr", "usr\\lib"], "usr\\*"),
          ["usr/bin", "usr\\lib"] if normsep else ["usr\\lib"],
      )
  
imports: import unittest
  import os
  import string
  import warnings
  from fnmatch import fnmatch, fnmatchcase, translate, filter
label_desc: Use image node_id 4 for calling the FilterTestCase obj's underlying member method code with example usage: obj.test_sep() without return types